using?System;
using?System.IO;
using?System.Text;
using?System.Collections.Generic;
using?System.Text.Regularexpressions;

namespace?System
{
????public?class?Torrent
????{
????????#region?私有成員字段
????????string?announce?=?““;
????????Listject>?announcelist?=?new?Listject>（）;
????????string?comment?=?““;
????????string?commentutf8?=?““;
????????string?createdby?=?““;
????????DateTime?creationdate?=?new?DateTime（1970?1?1?0?0?0）;
????????string?encoding?=?““;
????????#endregion

????????#region?屬性
????????public?string?Announce?{?get?{?return?this.announce;?}?set?{?this.announce?=?value;?}?}
????????public?Listject>?AnnounceList?{?get?{?return?this.announcelist;?}?set?{?this.announcelist?=?value;?}?}
????????public?string?Comment?{?get?{?return?this.comment;?}?set?{?this.comment?=?value;?}?}
????????public?string?CommentUTF8?{?get?{?return?this.commentutf8;?}?set?{?this.commentutf8?=?value;?}?}
????????public?string?CommentBy?{?get?{?return?this.createdby;?}?set?{?this.createdby?=?value;?}?}
????????public?DateTime?CreationDate?{?get?{?return?this.creationdate;?}?set?{?this.creationdate?=?value;?}?}
????????public?string?TorrentEncoding?{?get?{?return?this.encoding;?}?set?{?this.encoding?=?value;?}?}
????????#endregion

????????FileStream?fs;
????????BinaryReader?br;

????????public?Torrent（string?path）
????????{
????????????fs?=?new?FileStream（path?FileMode.Open）;
????????????br?=?new?BinaryReader（fs）;
????????????byte[]?buf?=?new?byte[1];
????????????string?str?=?““;
????????????buf[0]?=?br.ReadByte（）;
????????????str?=?Encoding.UTF8.GetString（buf?0?1）;
????????????if?（str?==?“d“）
????????????{
????????????????this.ReadAll（）;
????????????}
????????????else
????????????{
????????????????Exception?e?=?new?Exception（“無法解析此文件“）;
????????????????throw?e;
????????????}
????????}

????????int?ReadInt（BinaryReader?br）
????????{

????????????return?0;
????????}

????????string?ReadString（BinaryReader?br）
????????{
????????????byte[]?buf?=?new?byte[1];
????????????string?str?=?““;
????????????buf[0]?=?br.ReadByte（）;
????????????str?=?Encoding.UTF8.GetString（buf）;
????????????Regex?reg?=?new?Regex（“^[0-9]*$“）;
????????????if?（reg.Match（str）.Value?!=?string.Empty）
????????????{
????????????????buf[0]?=?br.ReadByte（）;
????????????????string?tmpstr?=?Encoding.UTF8.GetString（buf）;
????????????????while?（tmpstr?!=?“:“）
????????????????{
????????????????????str?+=?tmpstr;
????????????????????buf[0]?=?br.ReadByte（）;
????????????????????tmpstr?=?Encoding.UTF8.GetString（buf）;
????????????????}
????????????????int?j?=?Convert.ToInt32（str）;
????????????????str?=?““;
????????????????byte[]?buf2?=?new?byte[j];
????????????????for?（int?i?=?0;?i?????????????????{
????????????????????buf2[i]?=?br.ReadByte（）;
????????????????}
????????????????str?=?Encoding.UTF8.GetString（buf2）;
????????????????return?str;
????????????}
????????????else
????????????{
????????????